my code doesn't get into my If statement
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So my code doesn't get into my first if statment for some reason even though it's valid check the screen shot for Counter and Sc values
% function for Perturb and Observe MPPT algorithm
function k_values=P_and_O_Final(sc,Vc,k,RL)
counter=sc-4;
if counter>1 && counter<sc-4
I_next_1=(Vc(sc+1))/RL;
I_next_2=(Vc(sc+4))/RL;
P_next_1=Vc(sc+1)*I_next_1;
P_next_2=Vc(sc+4)*I_next_2;
I_actual=(Vc(sc))/RL; % The input current value in the current cycle
I_prev_1=(Vc(sc-1))/RL;
I_prev_2=(Vc(sc-4))/RL; % The input current value in the previous cycle
P_actual=Vc(sc)*I_actual; % to calculate the power value for the current cycle
P_prev_1=Vc(sc-1)*I_prev_1;
P_prev_2=Vc(sc-4)*I_prev_2; % To calculate the power value for the previous cycle
delta_V= Vc(sc+1)- Vc(sc) ;
delta_V1= Vc(sc+4)-Vc(sc);
delta_P= P_next_1 - P_actual;
delta_P1= P_next_2 - P_actual;
delta_V_1= Vc(sc)-Vc(sc-4 );
delta_V_2= Vc(sc)-Vc(sc-1);
delta_P_1= P_actual-P_prev_2;
delta_P_2= P_actual-P_prev_1;
if delta_P>0.0001
if delta_V>0
k=k-0.00002;
else
k=k+0.00002;
end
end
if delta_P1 >0.0001
if delta_V1>0
k=k-0.00002;
else
k=k+0.00002;
end
end
% delta_P1= [P_actual-P_prev_2,P_actual-P_prev_1]
%delta_V1=[Vi(z)-Vi(z-2) , Vi(z)-Vi(z-1)]
%delta_V=Vi(z)-Vi(z-1); % to calculate the difference between current voltage value and the previous one.
%delta_P=P_actual-P_prev; % to calculate the difference between current power value and the previous one.
%delta_V=[Vi(z)-Vi(z-2), Vi(z)-Vi(z-1), Vi(z)-Vi(z+1),Vi(z)-Vi(z+2)]
%delta_P=[P_actual-P_prev_2,P_actual-P_prev_1,P_actual-P_next_1,P_actual-P_next_2]
% if statment used to ecide whether to increase or decrease duty ratio(k) value
% depending on voltage and Power difference values.
if delta_P_1<(-0.0001)
if delta_V_1>0
k=k+0.00002;
else
k=k-0.00002;
end
if delta_P_2 <(-0.0001)
if delta_V_2>0
k=k+0.00002;
else
k=k-0.00002;
end
end
end
end
k_values=k % used to store new k in the output
end
采纳的回答
Antonio Ciociola
2020-8-15
The problem seems to be here:
counter=sc-4;
if counter>1 && counter<sc-4
If you set "counter" to "sc-4" the following condition can't be statisfied
counter<sc-4
The problem is that you used the "&&" operator and it means that you need to satisfy both conditions.
2 个评论
Mahmoud Elaktash
2020-8-15
Antonio Ciociola
2020-8-15
This is a more specifc question and it depends on the behaviour that you want to get (the goal of your code/function).
Looking at the code, it seems that you can force the code to go into the if statement if you modify the code like this:
if counter>1 && counter<=sc-4
But I'm not sure that is the behaviour that you want to obtain
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